Coincidence of a Lifetime

This pass-through required rerouting a 3/4" main water line to the unit above. First, the superintendent turned a large gate valve, shutting the water for the entire block of units. For thoroughness, I had the plumber install another valve -even though it would only serve other units above. Three days later, a home improvement crew (from another company) working in the unit above screwed through the piping and water was pouring through the ceiling. What could have taken hours to stop, took seconds.